... nameCangzhou Leader Steel pipe Co., Ltd.Business typeManufacture and exporterProductAPI 5L Welded Steel Pipe / Black Steel Tube Spec DescriptionOutside diameter114. ... ,Q345,A106, A53,ST42,ST52,304,316,316LQ195-Q345A API 5LTechniqueCold drawn,cold rolled,hot rolled,hot expandApplicationThe products are ... ,caps at the end,or according to customers’requirments API 5L Welded Steel Pipe / Black Steel Tube